The Padres are planning to offer Chase Headley an extension before the middle of the 2013 regular season. "We will do an offer that will be the largest offer we've ever made to a player in San Diego history," Padres executive chairman Ron Fowler said Wednesday, "and I think it will be very close to some of the numbers I read in the press." Headley is arbitration-eligible for the final time in 2014. He'll be a free agent heading into the 2015 season if a deal cannot be struck.